Hi partners,
In the future — we’ll let you know the date:
- You’ll only need to call
window.AP.theming.initializeTheming()- Themes will be visible on all instances
The future I mentioned above is just about here!
Progressively during next week, beginning Mon 27 Mar 2023, we will be enabling theming of Marketplace apps built with Connect across all customer instances of Jira Cloud. (Support for apps built with Forge will follow soon, and I’ll let you know that date once confirmed.)
From that point, any Marketplace partner will be able to start developing with design tokens and theming immediately — no need to fill in the form to enrol in early access. Go go go! 
Customers will see Marketplace apps themed if both of these are true:
- They have turned on light/dark themes in Jira labs in their personal settings; and
- Your Connect app calls
window.AP.theming.initializeTheming()
This means you should take care to not ship to customers in production until you’re ready any version of your app that calls initializeTheming(). Otherwise, customers will see the partially-themed app you’re working still on.
We’ll update what we’re communicating to customers so they know the first themed Marketplace apps will start to show up, but the message will continue to be that it’s a work in progress and you’re all working hard on getting your apps ready!
Separately, a heads-up that we’re acting on feedback from both customers and partners and are making tweaks to improve the colours used in both light and dark themes, so expect to see more of that in the coming weeks.
As always, please reply and let me & the team know with your questions!
Cheers,
Stephen